#include <netdb.h>
#include <signal.h>
-static char *server_capabilities = NULL;
+static char *server_capabilities;
static int check_ref(const char *name, int len, unsigned int flags)
{
if (!flags)
return 1;
- if (len > 45 || memcmp(name, "refs/", 5))
+ if (len < 5 || memcmp(name, "refs/", 5))
return 0;
/* Skip the "refs/" part */
if (len != name_len + 41) {
if (server_capabilities)
free(server_capabilities);
- server_capabilities = strdup(name + name_len + 1);
+ server_capabilities = xstrdup(name + name_len + 1);
}
if (!check_ref(name, name_len, flags))
if (nr_match && !path_match(name, nr_match, match))
continue;
ref = xcalloc(1, sizeof(*ref) + len - 40);
- memcpy(ref->old_sha1, old_sha1, 20);
+ hashcpy(ref->old_sha1, old_sha1);
memcpy(ref->name, buffer + 41, len - 40);
*list = ref;
list = &ref->next;
struct ref *refs,
struct ref **matched_ref)
{
- int match;
int patlen = strlen(pattern);
+ struct ref *matched_weak = NULL;
+ struct ref *matched = NULL;
+ int weak_match = 0;
+ int match = 0;
- for (match = 0; refs; refs = refs->next) {
+ for (weak_match = match = 0; refs; refs = refs->next) {
char *name = refs->name;
int namelen = strlen(name);
+ int weak_match;
+
if (namelen < patlen ||
memcmp(name + namelen - patlen, pattern, patlen))
continue;
if (namelen != patlen && name[namelen - patlen - 1] != '/')
continue;
- match++;
- *matched_ref = refs;
+
+ /* A match is "weak" if it is with refs outside
+ * heads or tags, and did not specify the pattern
+ * in full (e.g. "refs/remotes/origin/master") or at
+ * least from the toplevel (e.g. "remotes/origin/master");
+ * otherwise "git push $URL master" would result in
+ * ambiguity between remotes/origin/master and heads/master
+ * at the remote site.
+ */
+ if (namelen != patlen &&
+ patlen != namelen - 5 &&
+ strncmp(name, "refs/heads/", 11) &&
+ strncmp(name, "refs/tags/", 10)) {
+ /* We want to catch the case where only weak
+ * matches are found and there are multiple
+ * matches, and where more than one strong
+ * matches are found, as ambiguous. One
+ * strong match with zero or more weak matches
+ * are acceptable as a unique match.
+ */
+ matched_weak = refs;
+ weak_match++;
+ }
+ else {
+ matched = refs;
+ match++;
+ }
+ }
+ if (!matched) {
+ *matched_ref = matched_weak;
+ return weak_match;
+ }
+ else {
+ *matched_ref = matched;
+ return match;
}
- return match;
}
static void link_dst_tail(struct ref *ref, struct ref ***tail)
len = strlen(name) + 1;
ref = xcalloc(1, sizeof(*ref) + len);
memcpy(ref->name, name, len);
- memcpy(ref->new_sha1, sha1, 20);
+ hashcpy(ref->new_sha1, sha1);
return ref;
}
int len = strlen(src->name) + 1;
dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
memcpy(dst_peer->name, src->name, len);
- memcpy(dst_peer->new_sha1, src->new_sha1, 20);
+ hashcpy(dst_peer->new_sha1, src->new_sha1);
link_dst_tail(dst_peer, dst_tail);
}
dst_peer->peer_ref = src;
}
-static char *git_proxy_command = NULL;
-static const char *rhost_name = NULL;
+static char *git_proxy_command;
+static const char *rhost_name;
static int rhost_len;
static int git_proxy_command_options(const char *var, const char *value)
close(pipefd[1][0]);
}
+#define MAX_CMD_LEN 1024
+
/*
- * Yeah, yeah, fixme. Need to pass in the heads etc.
+ * This returns 0 if the transport protocol does not need fork(2),
+ * or a process id if it does. Once done, finish the connection
+ * with finish_connect() with the value returned from this function
+ * (it is safe to call finish_connect() with 0 to support the former
+ * case).
+ *
+ * Does not return a negative value on error; it just dies.
*/
-int git_connect(int fd[2], char *url, const char *prog)
+pid_t git_connect(int fd[2], char *url, const char *prog)
{
- char command[1024];
char *host, *path = url;
char *end;
int c;
if (path[1] == '~')
path++;
else {
- path = strdup(ptr);
+ path = xstrdup(ptr);
free_path = 1;
}
/* These underlying connection commands die() if they
* cannot connect.
*/
- char *target_host = strdup(host);
+ char *target_host = xstrdup(host);
if (git_use_proxy(host))
git_proxy_connect(fd, host);
else
if (pid < 0)
die("unable to fork");
if (!pid) {
- snprintf(command, sizeof(command), "%s %s", prog,
- sq_quote(path));
+ char command[MAX_CMD_LEN];
+ char *posn = command;
+ int size = MAX_CMD_LEN;
+ int of = 0;
+
+ of |= add_to_string(&posn, &size, prog, 0);
+ of |= add_to_string(&posn, &size, " ", 0);
+ of |= add_to_string(&posn, &size, path, 1);
+
+ if (of)
+ die("command line too long");
+
dup2(pipefd[1][0], 0);
dup2(pipefd[0][1], 1);
close(pipefd[0][0]);
int finish_connect(pid_t pid)
{
+ if (pid == 0)
+ return 0;
+
while (waitpid(pid, NULL, 0) < 0) {
if (errno != EINTR)
return -1;